The main component of the light shelf is a horizontal element that positioned either on the exterior or on the interior side of window façade, or both. Introduction Light shelf is a passive architectural element that serves the dual purpose of providing shade and reflected light.
However, in order to select the optimum parameters, a good compromise is needed, since changing the height and the position of the light shelf can significantly change its performance.ġ.
Daylight factor ecotect windows#
Although that the lighting analysis of various light shelves under overcast sky conditions shows a reduction in illuminance levels, analyzing the daylight distribution within study space shows that the internal/external light shelf is found to offer the best results in terms of the illuminance distribution, as it is found to be effective in terms of cutting the glare down and minimizing the brightness near windows on one hand, and provide the best results in terms of illuminance distribution on the other. Cardiff City (UK) is selected as the geographic location of the study. Modeling, simulations and lighting analysis calculations were performed by using daylight simulation software, i.e. The performance of selected light shelves was examined through simulating its effect on the illuminance levels in a hypothetical classroom (10.7 m x 7.4 m x 3 m). A group of typical light shelves is selected to analyze its performance selected light shelves represent six different settings, called “Types”. This paper aims to investigate how changes in the light shelf design parameters can affect its efficiency under overcast sky conditions.
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